n.上游，水源，分水口上游水位

The river has its headwaters in the Himalayas.
这条河发源于喜马拉雅山脉。
They hiked to the headwaters of the Amazon River.
他们徒步到了亚马逊河的源头。
The headwaters of the Nile are in Uganda.
尼罗河的源头在乌干达。
Pollution from factories threatens the headwaters of the lake.
工厂污染威胁着湖的源头。
The park protects the headwaters of several important rivers.
公园保护了几条重要河流的源头。
We need to preserve the forest as it serves as the headwater for our drinking water supply.
我们需要保护这片森林，因为它是我们饮用水供应的源头。
The headwaters of the river are an untouched wilderness.
河流的源头是一片未受干扰的荒野。
The explorers paddled upstream to reach the headwaters of the river.
探险家们划船逆流而上，到达了河流的源头。
A dam was constructed at the headwaters of the river to control flooding.
在河流的源头建造了一座水坝以控制洪水。
The conservation project aims to protect the fragile ecosystem around the headwaters.
这个保护项目旨在保护源头周围脆弱的生态系统。